Sony Music Publishing LLC is an American, Japanese-owned, music publisher. Responsible for publishing the largest quantity of music, with over six million songs owned or administered as of end March 2025, it is part of Sony Music Group, which is itself owned by Japanese conglomerate Sony Group Corporation. The company was formed as Sony/ATV in 1995 by the merger of the original incarnation of Sony Music Publishing and ATV Music, which was owned by late entertainer Michael Jackson. Jackson had purchased ATV Music, which included the Lennon–McCartney song catalog, in 1985.